mcrae



(No Model.) 3 Sheets-Sheet 1.

J. D. McRAE. AUTOMATIC VALVE;

No. 464,582. Patented Dec. 8, 1891 (No Model.) 3 Sheets-Sh et 2.

J. D. MoRAE.

AUTOMATIC VALVE.

No. 464,582 v Patented De0.8, 1891.

WWW

(No Model.) 3 Sheets-She'et 3.

J. D. MoRAE; KUTOMATIG VALVE.

No. 464,582. Patented Dec. 8,1891.

UNITED STATE ATENT OFFICE.

JOHN D. MORAE, OF BALDWVINSVILLE, NElV YORK.

AUTOMATIC VALVE.

SPECIFICATION forming part of Letters Patent No. 464,582, dated December8, 1891.

Application filed April 3, 1891. Serial No. 387,482; (llo model.)

To all whom it may concern:

Be it known that I, JOHN D. MCRAE, of Baldwinsville, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Automatic Valves, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

My invention relates to mechanisms for holding closed theinlet-valve inthe main water-supply pipe against the head of said water by means ofair or other pressure exerted through a system of levers against thestem of the valve.

My object is to produce an improved mechanism for the purpose aforesaidto be used with either a wet or dry pipe system, the normal pressure insuch piping being exerted through a system of levers against thevalvestem and holding the valve closedagainst the head of the wateruntil such pressure is from any cause reduced below a certain point,when the levers become disconnected and cease to bear against saidvalve, and then the valve is opened by the head of the water and thewater is let on into the piping system.

My invention consists in the several novel features of construction andoperation hereinafter described, and which are specifically set forth inthe claims.

It is constructed as follows, reference being had to the accompanyingdrawings, in which- Figure 1 is a sectional elevation of the valve setto hold the water from the main. Fig. 2 is a like view of the valve openand the water let on and the several parts in the position then assumedby them. Fig. 3 is afront elevation of the valve as open with thepressure-levers removed and showing the chamber of the air-pressurevalve in vertical transverse section. Fig. 4 is a transverse section ofthe water-valve chamber on the line X X in Fig. 3.

A is the casing of the main valve, provided with an opening 1 in itslower face, with a raised valve-seat 2 surrounding said opening,

with a drip 3 in the groove around the valveseat, with a suitableopening to receive the inlet-pipe at, and with another opening toreceive the outlet-pipe 5.

B is the main valve, connected by a balland-socket joint 6 to the stem 7and provided with suitable packing on top to securely close theinlet-pipe and with a circular groove 8 in its lower face, creating ahead 9 of proper size to fit closely in the opening through thevalve-seat and also creating an outwardlyflaring flange 10, adapted tofit over the outer edge of the valve-seat and receive its packing in theangle of the bottom of the groove. The inlet-pipe is provided with avalve-seat, and 11 is a drop-valve hinged to the inner side of the pipeand adapted to open by the pressure of the water when it is let on. v

A post 12 is erected upon the main valvechamber, upon which I mount theauxiliary pressure-chamber 0, having in its bottom a valve-seat and anopening through which the stem 13 of the valve projects below thebottom. A pipe 14 connects this, chamber to the pipe 15 of the pipingsystem, so that the same pressure is maintained in it as in the system.7

A lug 16 projects downward from the side of this chamber and is providedwith ashelf on one side, as shown in Fig. 1 by the dotted lines. Aweighted lever 17 has its fulcrum upon this she1f,and its inner endbears upward against the lower end of the valve-stem. second weightedlever lS is secured to a disk 19, pivoted upon an arm' 20 upon thecasing of the main valve, and its upper end engages with a notch in theinner end of the lever 17. This disk is provided on the left with astoppin (shown in dotted lines) and upon the right with a trip-stud 21,against which the upper end of the trip-bar 22 bears, while its lowerend is supported upon a lug 23 upon the casing of the main valve. A link24: fits loosely over the arm upon the trip-banand its lower end fitsover the end of the valvelever 25, which has its direct bearing upon a vand valve-lever 25, and through the valvestem holds the main valvetightly closed, all as shown in Fig. 1.

\Vhen from any cause the pressure in the piping system becomes reducedbelow a certain predetermined point, regulated by adjusting the weightupon the lever 17, then this weight will lower until the lever 18 isfree from the notch in lever 17 and said lever 18 will fall to the leftuntil the stop-pin strikes against the arm, as shown in Fig. 2. Thiswill rotate the dial, so that the trip-stud 21 will be raised and thetrip-bar released, when the link will fall, the Valve-lever 25 willdrop, and the water-pressure will force the main valve down into theposition shown in Fig. 2, and the valve 11 will drop down, and waterwill rush into the piping system.

As shown by Fig. 3, it will be seen that the post 12 is offset at oneside and that the disk 19 is in two parts, both secured upon a shaft 29,which brings the disk-section 19, upon which the trip-stud 21 ismounted, into proper vertical alignment with the stem 7 of the mainvalve.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. A valve comprising a casing with an inlet and an outlet pipe, atubular valve-seat raised above the bottom and opposite to the month ofthe inlet-pipe, a groove around the seat, anda drip-hole openinginto thegroove,in combination with the valve constructed with a fiat top, acircular groovein the bottom creating a flaring flange and inclosing ahead which fits within the valve-seat, and a valvestem connected to thevalve-body by aballand-socket joint, as set forth.

2. A valve comprising a casing with inlet and outlet pipe openings, atubular valve-seat opposite the inlet-opening, a groove around the seat,a valve consisting of a body having a groove in its bottom creating aflaring flange and a head adapted to fit into the valve-seat, while theflange fits over, and the valve-stem connected to the valve by aball-and-socket joint and extending down through the valveseat and belowthe casing and provided with an adjustable point, in combination with avalvelever having its bearing upon the valve-stem and its fulcrum upon alug below the casing, a link fitting over the outer endof said lever andover the arm of an angular trip-bar supported upon the casing, arotatable disk journaled upon an arm upon the casing and provided with atrip-stud, with which the upper arm of the trip-bar detachably engages,having its fulcrum upon a lug below the casing of the pressure-chamberand abearing against the stem of the valve in said chamber and providedwith a notch, with which the tripbar engages, a pressure'chamber abovethe main-valve casing, a valve therein having a downwardly-projectingstem, a pipe connectiug said chamber to the piping system, and adrop-valve in the eduction-pipe.

In Witness whereof I have hereunto set my hand this 28th day of March,1801.

JOHN D. MORAE.

In presence of C. W. SMITH, Ilownnn P. DENISON.

